I bartered for a running Husqvarna 55 and a parts 55. I wanted to see if I could get the parts saw to work - it’s missing quite a few parts. No compression was because of stuck ring on exhaust side. Pulled the jug and freed the ring by soaking with Marvel Mystery Oil and gentle prying. Cleaned carbon out of the piston groove. Piston and cylinder didn’t seem very scored (but I don’t have a trained eye for this). Pretty decent compression by “thumb” gauge. Here comes the jury rigging....try not to swoon! Carb is a chinese aftermarket Stihl MS 210 - MS 250 off ebay. Used to win at auction with $4. Now, people have wised up and prices are higher. The H-L-T screws match up perfectly with cover holes. Breather is a skoal can with foam rubber. Choke lever is a coat hanger. On/Off switch is off a computer PS. Muffler is a metal spice can - Not much noise reduction but wanted a little back pressure. Had to surround it with a hose clamp cuz it blew the top off... yuk yuk. Runs pretty good after carb tuning. I may just save up for some “authorized” parts!